Syn, Jan: Why do not you show your design invention in a single stage, extremely low noise, low distortion, fast and wideband circuit? Anyone can take 110dB FB and show great LF specs in a slow circuit.

Originally posted by PMA There is a feedback and feedback. This has nothing to do with conventional dominant-pole VFB design. 57dB and 1.7MHz BW, no slew rate limitation. This counts.

We care how it sounds, not only how it measures THD in audio band.

"there is feedback and feedback" - that's the second best joke I've heard lately. The first is the Robert Heinlein quote: “Never try to teach a pig to sing; it wastes your time and it annoys the pig.”

And of course, when anything else fails, join the golden ear brigade team.

Wanna a circuit that has over 120dB OL gain, 100MHz unity gain OL bandwidth and is unconditionally stable for resistive loads? Take a look at the attachment. Now, try to figure out how it works, and what would it take to allow capactive loads (and hence make it useful for driving a power stage). Hint: you may still get over 120dB gain in the audio band, while limiting the BW at around 2 MHz.

Of course, this circuit sounds like crap It's built out of dirty sand and uses that "other" NFB that you dislike.